1985 Mercedes-Benz 230 — MOT failures & pass rate
Across 746 MOT tests, the 1985 Mercedes-Benz 230 recorded a 78.7% pass rate. That is 1.3 percentage points worse than all cars of a similar age, which fail at 20.0%. Failures cluster in lighting & signalling, body, structure & corrosion and suspension.
What the MOT record shows
One area stands out: lighting & signalling, recorded in 12.5% of tests against 8.7% for the next-worst category.
At component level the recurring items are component mounting prescribed areas, ball joint dust cover and headlamp aim — component mounting prescribed areas alone was recorded 56 times.
A 150k+ example is materially riskier than a 0-30k one: 29.8% versus 10.3%.
Suspension is the most common advisory, noted on 26.4% of tests — work that passed today but is likely due soon.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 12.5% | 93 |
| 2 | Body, structure & corrosion | 8.7% | 65 |
| 3 | Suspension | 8.6% | 64 |
| 4 | Brakes | 8.0% | 60 |
| 5 | Visibility | 4.8% | 36 |
| 6 | Steering | 3.4% | 25 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Component mounting prescribed areas | 56 |
| 2 | Ball joint dust cover | 39 |
| 3 | Headlamp aim | 35 |
| 4 | Service brake performance | 34 |
| 5 | Position lamp | 31 |
| 6 | Rbt (sp) | 26 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Suspension | 26.4% | 197 |
| 2 | Body, structure & corrosion | 20.0% | 149 |
| 3 | Brakes | 18.0% | 134 |
| 4 | Emissions & environmental | 12.6% | 94 |
| 5 | Tyres | 12.5% | 93 |
| 6 | Steering | 11.7% | 87 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 39 | 10.3% |
| 30-60k | 73 | 12.3% |
| 60-90k | 125 | 18.4% |
| 90-120k | 179 | 21.8% |
| 120-150k | 152 | 20.4% |
| 150k+ | 178 | 29.8% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 176 | 23.3% |
| 2022 | 159 | 24.5% |
| 2023 | 150 | 18.7% |
| 2024 | 138 | 17.4% |
| 2025 | 123 | 21.9% |
What to check before buying a 1985 230
The failure pattern for this year is specific enough to inspect against: lighting & signalling accounted for 12.5% of tests. Start there.
- Lighting & signalling (12.5% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Body, structure & corrosion (8.7% of tests): The one to take seriously on older cars — corrosion to structural areas can be costly and is an MOT failure. Typical repair: £200–£1,500+.
- Suspension (8.6% of tests): Worn drop links, bushes, springs or shocks — listen for knocks over bumps and check for uneven tyre wear. Typical repair: £150–£450 per corner.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 1985 Mercedes-Benz 230s pass their MOT?
78.7% of the 746 1985 Mercedes-Benz 230 MOT tests in this dataset passed — a 21.3% fail rate.
What is the most common MOT failure on a 1985 Mercedes-Benz 230?
Lighting & signalling, recorded in 12.5% of tests, followed by body, structure & corrosion (8.7%).
Does the 1985 230 get worse with mileage?
Its MOT fail rate rises from 10.3% in the 0-30k band to 29.8% in the 150k+ band.
Methodology & source. Based on 746 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.